Dynamical conductance in the two-channel Kondo regime of a double dot system

A. I. Tóth, L. Borda, J. Von Delft, G. Zaránd

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We study finite-frequency transport properties of the double dot system recently constructed to observe the two-channel Kondo effect. We derive an analytical expression for the frequency-dependent linear conductance of this device in the Kondo regime. We show how the features characteristic of the two-channel Kondo quantum critical point emerge in this quantity, which we compute using the results of conformal field theory as well as numerical renormalization group methods. We determine the universal crossover functions describing non-Fermi-liquid vs Fermi-liquid crossovers and also investigate the effects of a finite magnetic field.

Original languageEnglish
Article number155318
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume76
Issue number15
DOIs
Publication statusPublished - Oct 23 2007

Fingerprint

Kondo effect
Fermi liquids
Describing functions
Transport properties
crossovers
Magnetic fields
renormalization group methods
Liquids
critical point
transport properties
liquids
magnetic fields

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Dynamical conductance in the two-channel Kondo regime of a double dot system. / Tóth, A. I.; Borda, L.; Von Delft, J.; Zaránd, G.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 76, No. 15, 155318, 23.10.2007.

Research output: Contribution to journalArticle

@article{bdd9f14bd6d24f69998565ffd68069fe,
title = "Dynamical conductance in the two-channel Kondo regime of a double dot system",
abstract = "We study finite-frequency transport properties of the double dot system recently constructed to observe the two-channel Kondo effect. We derive an analytical expression for the frequency-dependent linear conductance of this device in the Kondo regime. We show how the features characteristic of the two-channel Kondo quantum critical point emerge in this quantity, which we compute using the results of conformal field theory as well as numerical renormalization group methods. We determine the universal crossover functions describing non-Fermi-liquid vs Fermi-liquid crossovers and also investigate the effects of a finite magnetic field.",
author = "T{\'o}th, {A. I.} and L. Borda and {Von Delft}, J. and G. Zar{\'a}nd",
year = "2007",
month = "10",
day = "23",
doi = "10.1103/PhysRevB.76.155318",
language = "English",
volume = "76",
journal = "Physical Review B-Condensed Matter",
issn = "0163-1829",
publisher = "American Physical Society",
number = "15",

}

TY - JOUR

T1 - Dynamical conductance in the two-channel Kondo regime of a double dot system

AU - Tóth, A. I.

AU - Borda, L.

AU - Von Delft, J.

AU - Zaránd, G.

PY - 2007/10/23

Y1 - 2007/10/23

N2 - We study finite-frequency transport properties of the double dot system recently constructed to observe the two-channel Kondo effect. We derive an analytical expression for the frequency-dependent linear conductance of this device in the Kondo regime. We show how the features characteristic of the two-channel Kondo quantum critical point emerge in this quantity, which we compute using the results of conformal field theory as well as numerical renormalization group methods. We determine the universal crossover functions describing non-Fermi-liquid vs Fermi-liquid crossovers and also investigate the effects of a finite magnetic field.

AB - We study finite-frequency transport properties of the double dot system recently constructed to observe the two-channel Kondo effect. We derive an analytical expression for the frequency-dependent linear conductance of this device in the Kondo regime. We show how the features characteristic of the two-channel Kondo quantum critical point emerge in this quantity, which we compute using the results of conformal field theory as well as numerical renormalization group methods. We determine the universal crossover functions describing non-Fermi-liquid vs Fermi-liquid crossovers and also investigate the effects of a finite magnetic field.

UR - http://www.scopus.com/inward/record.url?scp=35648973296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=35648973296&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.76.155318

DO - 10.1103/PhysRevB.76.155318

M3 - Article

AN - SCOPUS:35648973296

VL - 76

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 0163-1829

IS - 15

M1 - 155318

ER -